Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 352 AM EDT Fri Jun 10 2016 Valid 12Z Fri Jun 10 2016 - 12Z Sun Jun 12 2016 ...Heat and humidity returns to the eastern states this weekend... ...Severe thunderstorms possible for the northern High Plains and across the Upper Midwest, Great Lakes and Northeast... Hot and dry conditions will persist across the central Plains and portions of the Deep South through the weekend. Warm, moist air will spread eastward from the Midwest into the Mid-Atlantic region this weekend - high temperatures on Saturday are forecast to climb into the low 90's with a chance of showers and thunderstorms. Numerous showers and thunderstorms are forecast to persist near a stalled frontal boundary along the Gulf Coast and Florida. The boundary will nudge northward and slowly dissipate during the weekend. Residual shortwave energy that is trapped under the upper-level ridge is generating showers and thunderstorms across portions of the central and southern Rockies and is expected to linger through Sunday. An approaching upper-level low from the Pacific will help generate another round of convection across the Pacific Northwest, Intermountain West and the Northern Rockies/surrounding areas. The Storm Prediction Center has identified eastern Montana with an enhanced risk and the western half of the Dakotas as having a slight risk for the development of very strong to severe thunderstorms this weekend. Another closed low is forecast to develop in the vicinity of the Hudson Bay and will drag a cold front through the Great Lakes by Saturday evening/early Sunday morning. The western flank of the front will become quasi-stationary over the northern Plains. Showers and thunderstorms are forecast all along the front from the Upper Midwest to the Mid-Atlantic/northern Appalachians. A slight risk for severe storms has been issued for portions of the Upper Midwest, Great Lakes and Northeast. Much of the northern tier states could have 1 to 2 inches of rain by the end of the weekend. Campbell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php